HCnix throwing exception while create new domain.

This problem may occur in Centos 5.x version, in order to fix this issue PHP version needs to be updated to 5.2.

How to upgrade PHP 5.1.6 with PHP 5.2 on Linux?

Go to location /etc/yum.repos.d

Create a file here with name CentOS-Testing.repo

Copy below content in file CentOS-Testing.repo and save file.

# CentOS-Testing:
# !!!! CAUTION !!!!
# This repository is a proving grounds for packages on their way to CentOSPlus and CentOS Extras.
# They may or may not replace core CentOS packages, and are not guaranteed to function properly.
# These packages build and install, but are waiting for feedback from testers as to
# functionality and stability. Packages in this repository will come and go during the
# development period, so it should not be left enabled or used on production systems without due
# consideration.
[c5-testing]
name=CentOS-5 Testing
baseurl=http://dev.centos.org/centos/$releasever/testing/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://dev.centos.org/centos/RPM-GPG-KEY-CentOS-testing
includepkgs=php*